Author 'Gélinotte' (Id 195074 ) : Sunset Crater located to the NE of Flagstaff, Arizona, is an extinct volcano whose last eruption dates back to approximately 1000 years. The landscape still retains traces of this cataclysm, with impressive lava flows. It owes its name because of the tasks reddish formed by the oxidation of iron and sulfur. Some vegetation tries to break through these lava fields.
This site really deserves a detour.